Dental appliance



FIG. 1 is a front perspective view of a dental appliance showing our new design with broken lines used for purposes of illustration forming no part of the claimed design;

FIG. 2 is a front perspective view of the dental appliance of FIG. 1;

FIG. 3 is a right side elevation view of the dental appliance of FIG. 1;

FIG. 4 is a left side elevation view of the dental appliance of FIG. 1;

FIG. 5 is a top elevation view of the dental appliance of FIG. 1; and,

FIG. 6 is a bottom elevation view of the dental appliance of FIG. 1. 

The ornamental design for a dental appliance, as shown and described. 